/*
package com.itheima.controller.backend.security;

import com.itheima.common.constant.MessageConstant;
import com.itheima.mapper.UserMapper;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

@Service
public class SpringSecurityUserService implements UserDetailsService {
    //查找服务，实现查询数据库
    @Autowired
    private UserService userService;
    @Autowired
    private UserMapper userMapper;

    //根据用户名查询数据库中用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        //从数据库中查询用户
        User user = userMapper.findByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException(MessageConstant.LOGIN_FAIL);
        }
        //查询用户角色

        List<Role> roles = userMapper.findRByUserRole(user.getId());
        //把角色转换为数组
        String[] roleKeyword = roles.stream()
                .map(Role::getKeyword)
                .collect(Collectors.toList())
                .toArray(new String[0]);

        List<GrantedAuthority> authorityList = AuthorityUtils.createAuthorityList(roleKeyword);

        user.setAuthorities(authorityList);

        return user;
    }
}
*/
